Dean Martin as Dr. Steve Harris

Jerry Lewis as Homer Flagg

Janet Leigh as Wally Cook

Edward Arnold as The Mayor of New York

Fred Clark as Oliver Stone

Sheree North as Jitterbug Champion

Sammy White as Waiter

Sid Tomack as Master of Ceremonies

Sig Ruman as Dr. Emile Egelhofer

Richard Loo as Dr. Lee

Raymond Greenleaf as Conductor

Walter Baldwin as Isaiah Jackson

Fay Roope as Man

John Alderson as Yankee Catcher (uncredited)

Art Baker as Radio Announcer (uncredited)

Frank Baker as Nightclub Patron (uncredited)

Benjie Bancroft as Cop (uncredited)

Bobby Barber as Bellboy (uncredited)

Richard Barron as Doorman (uncredited)

Don Bender as Newsboy (uncredited)

Arthur Berkeley as Waiter (uncredited)

Stanley Blystone as Ike, the Train Engineer (uncredited)

Paul Bradley as Nightclub Patron (uncredited)

Frank Branda as Pump Room Chief (uncredited)

Jack Bruce as Policeman (uncredited)

George Bruggeman as Baseball Spectator (uncredited)

Bill Cartledge as Bellboy (uncredited)

Gordon Carveth as Ceremony Spectator (uncredited)

Sue Casey as Showgirl (uncredited)

Lane Chandler as Policeman (uncredited)

Beulah Christian as Wedding Guest (uncredited)

Bud Cokes as Baseball Spectator (uncredited)

Booth Colman as Fernandez (uncredited)

James Conaty as Man in Hotel Lobby (uncredited)

Clancy Cooper as Newspaper Slugger (uncredited)

Gino Corrado as Shoe Salesman (uncredited)

Roger Creed as Ambulance Driver (uncredited)

Oliver Cross as Wedding Guest (uncredited)

Frankie Darro as Bellboy Captain (uncredited)

George Davis as Doorman (uncredited)

Louise De Carlo as Public Stenographer (uncredited)

Jean Del Val as French Chef (uncredited)

Don Dunning as Newpaper Slugger (uncredited)

Marla English as Manicurist (uncredited)

Joe Evans as Waiter (uncredited)

Franklyn Farnum as Man at Bus Depot (uncredited)

Fritz Feld as Barber (uncredited)

Jac Fisher as Policeman (uncredited)

Bess Flowers as Patron at Wonderland Ballroom (uncredited)

Charles Fogel as City Official (uncredited)

Eduard Franz as Dr. Nassau (uncredited)

Herschel Graham as Ceremony Spectator (uncredited)

Kathryn Grant as Manicurist (uncredited)

Dabbs Greer as Leader of the Boy Rangers (uncredited)

Audrey Hansen as Hostess (uncredited)

Sam Harris as New York City Official at Airport (uncredited)

Bill Hickman as Newspaper Office Worker (uncredited)

Al Hill as Newspaper Slugger (uncredited)

Jimmie Horan as Grocery Clerk (uncredited)

Gretchen Houser as Jitterbug Dancer (uncredited)

Kenner G. Kemp as Nightclub Patron (uncredited)

Donald Kerr as Martin (uncredited)

Ed Kerr as Ceremony Spectator (uncredited)

Paul Kruger as Police Chief (uncredited)

Norman Leavitt as Photographer (uncredited)

Emmett Lynn as Gas Station Attendant (uncredited)

Mike Mahoney as Tank Commander (uncredited)

Rudy Makoul as Announcer (uncredited)

Hank Mann as Busboy (uncredited)

Philo McCullough as Nightclub Patron (uncredited)

Jewel McGowan as Jitterbug Dancer (uncredited)

Frank McLure as Dignitary at Airport (uncredited)

Torben Meyer as Chef (uncredited)

Frank Mills as Vagrant at Park (uncredited)

Hans Moebus as Nightclub Patron (uncredited)

Ralph Montgomery as Waiter (uncredited)

Monty O'Grady as Wedding Guest (uncredited)

Michael O'Hara as Armed Guard (uncredited)

Ray Page as Intern (uncredited)

Foster H. Phinney as Wedding Guest (uncredited)

Murray Pollack as Wedding Guest (uncredited)

Harry 'Snub' Pollard as Vagrant in Park (uncredited)

Max Power as Newspaper Slugger (uncredited)

Fred Rapport as Baseball Spectator (uncredited)

Cosmo Sardo as Assistant Tailor (uncredited)

Lennie Smith as Jitterbug Dancer (uncredited)

Lou Southern as Jitterbug Dancer (uncredited)

Norman Stevens as Ceremony Spectator (uncredited)

Bert Stevens as Hotel Waiter (uncredited)

Jack Stoney as Intern (uncredited)

Robert Strong as Wedding Guest (uncredited)

Brick Sullivan as Cop (uncredited)

Grady Sutton as Gift Shop Owner (uncredited)

Fred Sweeney as Old Man (uncredited)

Ted Thorpe as Tailor (uncredited)

Arthur Tovey as Flower Delivery Man (uncredited)

Max Ann Viault as Customer (uncredited)

Stephen Wootton as Boy (uncredited)

Freda Angela Wyckoff as Jitterbug Dancer (uncredited)

Fred Zendar as Reporter (uncredited)

Tommy Summers as Elevator Boy (uncredited)